Extraction of oil sand bitumen with two solvents
US8858786B2 · kind B2 · utility
1Cited by
21References
26Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 31, 2011 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Oct 27, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P30/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for extracting bitumen from oil sand using a combination of heavy solvent and light solvent is provided comprising digesting mined oil sand with a high-flash point heavy solvent (HS) to produce a dense oil sand slurry; mixing the dense slurry with a light solvent (LS) to give a heavy solvent to light solvent (HS/LS) mass ratio of about 70/30 to about 50/50 and subjecting the thinned oil sand slurry to a first stage solid-liquid separation to produce a first liquids stream containing bitumen and a first solids stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.